oak apple

noun

A spherical type of oak gall, produced by an oak gall wasp (tribe Cynipini).

First used 15th c.
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Meanings

nounoak apple (plural oak apples)

plural oak apples · alternative oak-apple

  1. A spherical type of oak gall, produced by an oak gall wasp (tribe Cynipini).First known use 15th c.

    [T]he small Apples which I have often observ'd to grow on the leaves of an Oak call'd Oak-apples […] are nothing but the Matrices of an Insect, as I elsewhere show.

    1665, Robert Hooke, Micrographia, section XXV

Synonyms & antonyms

Also see
oak gall
Cite this entry
APA

oak apple. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/oak%20apple

MLA

“oak apple.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/oak%20apple. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “oak apple,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/oak%20apple.

Source: oak apple on Wiktionary, CC BY-SA 4.0.